Long-lasting foam, short life

The device makes excellent milk froth. Even a friendly pizzeria owner who makes every day with professional equipment Cappuccino, has confirmed to me that he was so not a milk froth gets back. Unfortunately, my first instrument has stretched the wings after about 6 months. (Suspected engine failure). I use the machine ca. 1x / day, while the engine never runs longer than 30 seconds. The replacement unit I have now 3 months. Let's see how long this goes .....